NDLI: Divergent behavioural responses of gypsy moth (Lymantria dispar) caterpillars from three different subspecies to potential host trees.

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Divergent behavioural responses of gypsy moth (Lymantria dispar) caterpillars from three different subspecies to potential host trees.

Content Provider	Europe PMC
Author	Clavijo McCormick, Andrea Arrigo, Luca Eggenberger, Helen Mescher, Mark C. De Moraes, Consuelo M.
Abstract	Almost all previous work on host-plant selection by insect herbivores has focused on adult behaviour; however, immature life stages can also play an active role in host discrimination. The important forest pest Lymantria dispar (gypsy moth) has three recognised subspecies: the European, Asian, and Japanese gypsy moth. Unlike the other two subspecies, the European subspecies is characterised by a loss of female flight ability, which might impose a selective pressure on larvae to actively engage in host-plant selection. We therefore explored the interactions of early-instar larvae from laboratory colonies of each subspecies with four potential hosts of differing quality: oak, beech, maple, and pine-measuring larval survival and performance, feeding preferences, responses to host-derived odour cues, and the propensity to disperse from hosts via ballooning. Compared to larvae from the Asian and Japanese subspecies, larvae from the (American-originated) European gypsy moth colony exhibited (i) significantly lower survival on the poorest quality host (pine), (ii) an ability to discriminate among hosts via olfactory cues; and (iii) higher propensity to disperse from sub-optimal hosts. These results are consistent with the hypothesis that larvae from flightless female European Gypsy moth subspecies play a more active role in host-plant selection.
Journal	Scientific Reports [Sci Rep]
Volume Number	9
DOI	10.1038/s41598-019-45201-3
PubMed Central reference number	PMC6586621
Issue Number	1
PubMed reference number	31222054
e-ISSN	20452322
Language	English
Publisher	Nature Publishing Group
Publisher Date	2019-06-20
Publisher Place	London
Access Restriction	Open
Subject Keyword	Plant sciences Ecology Entomology
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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